It largely depends on the goal of the policy. There are often security and compliance reasons for limiting what people do with technology such as e-mail (preventing electronic harassment, or the...
Both may be used to mean "at work using a computer." But they have different additional meanings. To work on something usually means to repair it or improve it, like a broken or malfunctioning...
Hahahaha... is that a serious Question? No, however the research to provide this to happen is being developed. ---That was a joke answer, for a joke Question. In case this wasn't a joke and just a...